Im james menendez. From here in the world newsroom, we send out correspondents to bring you the best stories from across the globe. In this weeks programme. As barack obama leaves the white house after eight years, jon sopel looks back at his legacy as the United States first African American president. I think his legacy to him is more important right now to paint a picture that he did a real good job. But, most black folks are disappointed because we feel he could have done more. The Culture Clash in the amazon. We report on brazils plans to build huge hydroelectric dams, which could change the worlds biggest rainforest for ever. The impact of so many of these structures on the worlds greatest river system, its environment and its people will be immense. Tell me what you are about to inject . Its good cocaine, a lot of heroin and some diazepam benzodiazephine, just to make the heroin stronger. Inside denmarks fix rooms. We get exclusive access to clinics where drug addicts can legall